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AssigneeTosoh Corporation
InventorsToshikazu Kato, Hiroshi Inoue, Satoshi Tomagou, Noriaki Emura
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In a process in which a poly (arylene sulfide) is synthesized by reacting a dihaloaromatic compound and an alkali metal sulfide in a polar organic solvent, the curing ability of the product polymer is significantly enhanced by introducing a small proportion of a hydroxyl group-containing polyhaloaromatic compound to the reaction mixture when a conversion of at least 60% has been achieved with respect to the dihaloaromatic compound present in the reaction mixture. The product polymer may be advantageously employed in various molding, forming or coating processes to provide the produced articles with increased strengths. The hydroxyl groups introduced into the polymer enable the polymer to be modified, if desired.
A process for producing a poly (arylene sulfide) comprising reacting a dihaloaromatic compound with an alkali metal sulfide in a polar organic solvent, wherein when a conversion of at least 60 mole % of the dihaloaromatic compound has been achieved in the reaction system a hydroxyl group-containing polyhaloaromatic compound is added to the reaction mixture in a proportion of from 0.05 to 10 mole % with respect to the alkali metal sulfide and the reaction is allowed to further continue.
Dependencies are inferred from the claim text.